Seven excellent stories first published from 1944 to 1949, including the classic Lewis Padgett's (Kuttner and Moore) "Ex Machina"; Clifford D. Simak's "Ogre" (not otherwise easy to find); Fredric Brown; Theodore Sturgeon; H. Beam Piper; Kris Neville; and John Pierce's unusual take on immortality "Invariant". The editor's Introduction discusses briefly the history of the magazine. A great collection, every story a great read.